Having problems installing Neopixel python driver

Trying to install the Unicorn-hat Python library on a RPi Zero W with:

curl -sS https://get.pimoroni.com/unicornhat | bash

Getting this message:

This script will install everything needed to use
Unicorn HAT/pHAT

Always be careful when running scripts and commands copied
from the internet. Ensure they are from a trusted source.

This script should -- only be run on a Raspberry Pi with RPi OS --
other systems and SBCs are not supported and may explode!

If you want to see what this script does before running it,
you should run: 'curl https://get.pimoroni.com/unicornhat'

Do you wish to continue? [y/N] y

Checking environment...
Updating apt indexes...
...W: http://raspbian.raspberrypi.com/raspbian/dists/bookworm/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
Checking hardware requirements...

Checking for packages required for GPIO control...
raspi-gpio is already installed
.....................RPi.GPIO installed and up-to-date

Unicorn HAT/pHAT comes with examples and documentation that you may wish to install.
Performing a full install will ensure those resources are installed,
along with all required dependencies. It may however take a while!

Do you wish to perform a full install? [y/N] y

Checking for dependencies...
python3-dev is already installed

Installing Unicorn HAT/pHAT library for Python 3...

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    For more information visit http://rptl.io/venv

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.
Python 3 library install failed!
If problems persist, visit forums.pimoroni.com for support

Not sure what to do next. Any help would be appreciated.

EDIT: Pimoroni are working on updating the installers. Might take a while though.

It’s a change made in Bookworm.
For more information visit http://rptl.io/venv

Raspberry Pi Documentation - Raspberry Pi OS
IMPORTANT From Bookworm onwards, packages installed via pip must be installed into a Python Virtual Environment using venv. This has been introduced by the Python community, not Raspberry Pi; see PEP 668 for more details.